Drifting valve and control mechanism



Sept, 8, 1925.

R. P. LOUGHLIN DRIFTING VALVE AND CONTROL MECHANISM 3 Sheets-Sheet lFiled Oct. 20 1924 Sept. 8, 925.

l1,552,441 4 R. P. LOUGHLIN DIFTING VALVE AND CONTROL MECHANISM 4Filedoci, 2o. 1924 s sheets-sheep 2 F/c; vja F/AG. 11

v INVENTOR Patented Sept. 8, i925.

RAYMIOND- P. LOUGHLIN, OF BROOKLYN, NEW YORK.

DRFTING VALVE AND CONTROL MECANISM.

Application filed Gctober 2019241 Serial No. 744,689.

To @ZZ w/lom t may concern.'

Be it liner-.n .at ariroxn' l. Lonen- Lizv, a citizen of the UnitedStates, residing at East 15th Street, Brooklyn, in the countyr of Kingsand Sta-te of New' York, have invented certain new and usefullmprovements in a lrifting ValveJ and Control lilechanisin, of which thefollowing is a specification.

My invention relates to a. drifting valve and control mechanism and moreparticularly to a` steam locomotive drifting valve and its noveltyconsists in the adaptation and arrangement of parts as will be morefully hereinafter pointed out. Y

The use of superheated steam in locov.notives necessitates frequentoverhauling of the cylinders and valve chests in order to remove thelarge deposits of carbon which have. accumulated in the exhaustpassageways and steam ports andupon'the valves and pistons. The carbon,which is hard and diiiicult to remove, is the result of thecarbonization of the cylinder lubricating oil when the. locomotive iscoasting or drifting` at which time air isr drawn into the cylindersthru the relief valves or thru the exhaust passageway and smoke box.This air striking the films of oil which are at the high temperature ofthe superheat causes them to disintegrate. leaving a densehard depositIof carbon which in a comparatively short time chokes up the ports andpassage that satisfactory operation is impossible. isi'loreovor, cindersfrom the smoke box or bits of the carbon will cause sco-ring of therings and seats with consequent lealiage and poor performance. Also ifsteam is not supplied in some amountI to the main cylinders under allruiming conditions the lubrication of the cylinders ceases with theresultant danger of overheating and scoring of t-he cylinders.

To overcome this carbonization various devices have been used to admitsaturated steam from the boiler to some portion of the cylinder or valvechest, while the locomotive is drifting, but such devices are comways tosuch an extent plicated and sometimes freeze up in very.

control valve. ltion of the control valve on the line 4 4. of Figure 1.'of' the control valve with the lower portion is a side elevation of thedevice showing the connections to the steam chests. Figure 3 is a planof one of the connections to the Figure 4 is a vertical sec- Figure 5 isan endl elevation and 11 are vertical sections on the lines' -10 and11-11 respectively of Figure 9i. Figure 12 is a horizont-al section onthe line 1.2-12 of Figure 9; Figure 13' is a vertical. section on theline 13-13 of Figure l. Figure 14- is a vertical section'on the line1--14 of llligure 13.- Figure 15 is a plan view of a portion of' themain valve. Figure 16 is al plan view of the main valve withthetop'removed showing a quar ter section thru one of the ports. Figure 17is aY pla-.n view of' Vone of the parts of the main valve.

ln the drawings it will be seen that my device consists ofV two majorparts, an air operated steam val-ve 21, hereinaft r called the mainvalve, for admitting saturated steam tothe steam chests 22 thru pipes 23and 24 and a steam operated air valve-725 for controlling the openingand closing' of the main valve 2l. As the 'locomotive is operated themain valve 21 must be closed when the throttle is open and also when thelocomotive is standing still. Ity mustbe open when the locomotive isdrifting. The control valve 25 accomplishes this by admitting compressedair to liney 26 and eX- hausting line 27, thereby closing the main valve21, or vicer versa., thereby opening the main valve 21. The main valve21 is mounted on the top of the boiler 28 and receives saturated steam`from the steam dome 29 thru pipe 30; The control valve 25 mounted onthe smoke box 31 receives its supply of compressed' air thru line 82from the main air reservoir The lower portion of the control valve isconnected to the supply pipe 34 leadin-g to the steam chest, 22 by meansof' pipo 35. Figure 3 shows how line 27 branches so as to conneet witharms and 54 of the control valve 25. Line 26 branches in a like. man--Vner.

As` shown in Figure 4 the control valve consists of a body 25a in whichslides a sleeve 36 and a plunger 37. The lower end of the plunger isrigidly attached to a piston 38 which slides ina renewable bushing 42driven into the lower end of the control valve body 25a. This lower endis closedfby a cap 39 containing a passage 40 thru which steam can passfrom the supply pipe 34 by way of line 35 and push up piston 38 which ismade steam tight with rings 41. The lower end ofthe valve body 25 iscovered with asbestos 43 to prevent excessive condensation and theentire lower Vportion is protected from the elements by cover 44 held inplace by nuts 45 which screw onto cap V39. To vthe upper endr of ytheplunger 37 is attached a leather cup 46 fastened by nuts 47. This upperend of the plunger slides inside of sleeve 36 which has the upper insideportion enlarged to receive the leather cup 48 fastened by means of nuts49: to the end of cap 50 which closes the top of the valve body 25a. Thespace 48ay between the cups 46 and 48 is supplied with compressed airthru'passage 51 in cap 50 connected by a pipe 52 to port 61 opening intothe upper valve chamber 32b in arm thus causing both the plunger37 andthe ,fu-sleeve 36 tobe forced continually down-y ward. Y Y Y Theopposite sides of the sleeve 36 are formed with indented portions 36aand 36b having inclined sides which as the sleeve y moves up or downmake four tappets 55,

`whichareV horizontally mounted in valve body 25a, move in or out. Thesetappets 55 slide in bushings 56 driven into the arms' 53 land 54 kof thevalve body, 25a. AnyI movement-of the tappets 55 is transmitted 'n toVfour poppet valves 57v which are pressed onltheiwr seats by springs 58.The valves Y in arm 53 have on their endsleather cups 59 held in placeby washers 60 adapted tov make the ends of said valves air tight. InAthe right hand arm 53 the valve chambers are supplied with compressedair thruline 32 screwed into opening62 which leads to the valve chamber32a in the lower part of arm 53 as shown in Figure 12. An upper valvechamber 32b communicates with the lower thru opening 63 as shown inFigure The indented portions 36a and 36b onA sleeve 36 are so arrangedthat when the upper right valve 57 is shut the upper left is open, thelower right open and the lower left closed, or vice versa. VCaps 53ascrewed into arm 53 close the valve chambers 32aand y There are similarcaps 54a in armi 54.

ln the lower vportion of the valve ybody 25 are driven two pins 65 and74fwhich serve as pivots for two pawls 64 and 73 respectively. Pawl 64is pressed against to the left.

sleeve 36 by a tappet 66 and a spring 67, and pawl 73 in a similarmanner by a tappet 75 and a spring 76. VCaps 68 close the openingslwhich contain these tappets and springs. Pawl 64 has two shoulders 69and 72, and pawl 73 has a shoulder 77, all three of which are Aadaptedto engage the lower surface 36c of sleeve 36 and to detain the sleeveYin three different positions as may be observed more clearlyV in Figure7. Attached rigidly to piston 38 is a striking piece 71 having a surface70 adapted to engage shoulder 72 on pawl 64 and on the downward strokeof the piston 38 to throw pawl 64 far enough out to disengage shoulder69 from the sleeve 36, but not `far enough to prevent shoulder 72 fromengaging the slee-ve when at the lowest position as shown in Figure 8.On pawl 7 3 just below Vshoulder 77 is a surface`78 adapted to ocengaged by the upper corner of striking piece 71 on the upward stroke ofpiston 38, whereby the pawl 7 3 can be thrown out and shoulder 77disengaged from the sleeve 36. The sleeve 36 has three positionscorresponding to the position of the main valve .21 when the locomotiveis in active service.l

Figure 4 shows the positions of the internal parts of the control valve25 when the locomotive 1s running under power. Figure 7 lshows thepositions when drifting. Figure 8 shows them when standing still. Figurel3shows the position of main valve 21 when running or standing. Whendrifting the main valve 21 is open.'

In Figure 12 a feather key 81 keeps sleeve 36V in proper alignment withrespect to tappets 55. Passage 79 isv the exhaust port for the branch ofline 26 which enters arm 54 and passage 8O is the inlet portfor thebranch of line 26 which enters arm soVV There are similar ports 79a and8()a for line. 27 as shown inFigure 9. y

The main valve 21 as shown in Figure 13 has an upper portion 21a havingtwo cylinders 82 closed by caps 83.. A. piston 84 with heads 85, leathercups 86, washers 87 and nuts 88 slides in cylinders 82. Compressed airentering a port 89 thru line 27` will cause the piston 84 to move to theright, or if entering a port 90 thru line 26 then This motion istransmitted to arm 91 clamped to piston rod 84 by means of bolt 92 aswill be evident from Figure 14. Tn the end of arm 91l is driven a pin93upon which flanged roller 94 can turn freely. The rectilinear motionof the roller is transmitted to a revolvable stem 95 by means of lever96 clamped to stem 95 by means of bolt 97 as shown in Figure 15.

vThe lower end of stem 95`has a tongue 98 21 allows steam to flow thrulines 23 and 24 to the steam chests 22v as shown in Figure 1. Referringto Figure 13 chamber 104 in the lbase of the main valve 21 is alwaysfull of saturated steam supplied from the dome thru line 30. The plug100 isv tapered and held firmly ona renewable seat 101 by the pressureof steam admitted to an upper chamber 102 thru passage 103. Collar 95:Lon stem prevents escape of steam between stem 95 and a renewable bushing105. Re ferring to Figure 14 the arm 91 has an extension 106 whichbearsl against cross bar 107 which joins the cylinders 82 and in con--junction with finger.108 keeps arm' 91 in pro-per alignment with respectto lever 96. Both the extension 106 and the finger 108 serve as stopsfor piston 84 by striking against end surfaces 110 of the cylinders 82as piston 84 moves back and forth.

Figure 17 shows the plan of lever 91 with flat sides 109 which stopagainst end surfaces 110 of the cylinders 82.

Figure 13, shows the position of the piston 84 when the ina-in valve 21is closed, line 27 being exhausted and line 26 filled with air. Figure16 shows the position of the plug 100 when the main valve 21 is closed.Fig-ure 14 shows the position of the plug 100 when the main valve 21 isopen at which time line 26 is exhausted and line 27. filled with air.

rThe operation of my device is as follows. When the locomotive throttleis opened steam enters the supply pipe 34 from the suprerheater manifoldmaking the locomotive move in the usual and well known manne-r. A smallportion of the steaml entering thru line 35 forces piston 38- to risestriking sleeve 36 and forcing it to. move to the extreme position shownin- Fig-ure 4. Pawl 64 pivoted on pin 65 then slips into the positionshown under the influence of tappet 66 and spring 67. As long as thethrottle is open piston 38 or shoulder 69 ony pawl 64 will. hold sleeve36 in ruiming position. The sleeve in turn holds the upper left valve 57open and permits the upper right valve 57 to close thereby exhaustingline 2?'. J:fait the same time it opens the lower right valve 57 andcloses the lower left valve- 57 thereby iilling line 26. withcompressed' air. This closes. the mainV valve 21. lVhenV the throttle isclosed and the locomotive begins to drift line 35 exhausts thru thestack, and piston 38 returns toitslowest position,

.under the influence of the compressed, air

acting` von cup 46. ln doingA soy surface 70 of striking piece 71attached rigidly to piston 38 hits shoulder 72 on pawl 64 causing it torelease the sleevey 36 which is then forced down under the influence ofthe cumpressed air in chamber 48a immediately. above cup 46. Pawl731pivoted on pin 74 has in the meantime moved into position under theinfluence of' tappet 75 and spring 76 and holds the sleeve 36 in thedrifting position when the lower surface 36C of the sleeve 36 strikesthe shoulder 7 7 on the pawl 73 as shown in Figure 7 The upper left andlower right valves 57 are. now closedV and upper right and lower leftvalves 57 are now open thereby causing line 26 to exhaust and line 2"?to fill with compressed air and causing the main valve 21 to open andtcient to keep the `pressure in the steam chests 22l from building up toa point which would" overcome the force of the air pressure on piston 38and make it rise. 1When the brakes are applied and the locomotivegradually comes to, a stop, the pumpingl action of the .c

engines gradually diminishes and the steam pressure 1n the valve chestand llne 35 builds y up until it is suiiicient to push piston 38 upwarduntil the upper corner; of the striking piece 71 strikes surface 7 8 onpawl 7 4 there-V by throwing the pawl 7 4 out and allowing sleeve 36 todescend and rest on the shoulder i2 of pawl 64 as shown in Figure 8.rlhe upper right and they lower left peppe-t valves 5i' will now beclosed and the lower right and upper left valves 57 will be, opencausing line 2'? to exhaust and line26'to fill .with compressed airthereby closing the main valve 21.

Should the throttle be opened again*` while drifting and beforer thepressure has built up in` the manner just described,. sleeve 36 will bepushed again. to the upper or running position by piston 38 therebyclosing the main valve 21. y

While I have shown and-described various ways and forms in which myinvention may be carried out, l wish it to be understood that I am notlimited thereto but that my invention may be `embodied in numerousmodifications without any departure from the spirit and scope thereof.

l' claim:

1. In combination with a steam reciprocating locomotive, means forconveyingV an auxiliary supply of steamffrom the boilerl of thelocomotive to the main engines ofthe locomotive, valve means forcontrolling said auxiliary supply of steam, an oscillatable memberactuated by the normal operation of the locomotive, means actuatedv bythe normal operation of the locomotive for retaining said member at oneextremity of its path while the locomotive is standing, at the otherextremity of its. path while the locomotive is running under power, andat an intermediate position while the locomotive is drifting, and meansconnecting said oscillatable member and said valve; means whereby theclosing of said valve means is effected by the movement of said memberto .either extremity of its path and the opening VVof said valve meansis effected by the move- Vment of said member to said'intermediateposition.

2. lin combination with a steam reciprocating locomotive, means forconveying an auxiliary supply of steam from the boiler of the locomotiveto the main engines of the locomotive, valve means for controlling saidauxiliary supply of steam, an oscillatable member adapted to'b'edetained in a position intermediate with respect tothe extremities ofthe path of said oscillatable member, vmeans actuated by the normaloperation of the locomotive vfor oscillating said member in onedirection when the locomotive is runningunder'powerrand in the oppositedirection* when the locomotive ceases to run under power,nieans actuatedVbythe normal operation ofthe locomotive is effected by the movement ofsaid membery to said intermediate position.

8. In combination with a steam reciproeating locomotive, means forconveying an auxiliary supply of steam lfrom the boiler locomotive,valve means4 for controlling said auxiliary supply of steam, anoscillatable member adapted to be detained in a position intermediatethe extremities of the path of the oscillatable member, means actuatedby variation of the locomotive steam chest vpressure toroscillatingysaid member in one` direction when the locomotive is ruimingunder power and in the opposite'direction when the locomotive ceases torun under power, means actuated by variation of the locomotive steamchest pressure for detaining said member in said intermediate positionon the back movement of said member, means actuated by variation of thelocomotive steam chest pressure for interruptingv auxiliary supply ofsteam from the boiler of i the locomotive to the main engines of thelocomotive, valve means for controlling said auxiliary supply of steam,an oscillatable member adapted to be detained in a position intermediatethe extremepositions of said member, mea-ns actuated by variation of thelocomotive steam chest pressure lor oscillating,l said member in onedirection whenV the. locomotive is running under power and in theopposite direction when the locomotive ceases to run under power,

means actuated by variation of the locomo-1 tive Vsteam chest pressurefor detaining` said member in said intermediate position on'tlie backmovement of said member, means actuated by variationl of the locomotiifesteam chest pressure Vfor restraining` ksaid member from assumingsaid-,intermediate position when the locomotive ceases to` run underpower, means actuatedrby variation of the locomotive steam chestpressure forl interrupting said restraining,n means and said de-leating,` locomotive, means for conveying anauxiliary supply of steamfrointhe boiler of the locomotive to the main enginesiot the locomotive,valve'means for controllingD said auxiliary supply of Asteam adapted forair j operation, an oscillatable member Y adapted of the locomotive tothe main engines of the .to be detained in a position intermediate theextreme positions of said member, means actuated by variation of thelocomotive steam chest pressure for oscillating` saidmember in onedirection when the locomotive is running under power and in the oppositedirection when the locomotive ceases to run under power, means actuatedby variationoi" the locomotive steam chest pressurel or detainingsaidmember insaid intermediate position on the back movement oi' saidmember, means actuated byvariation of the locomotive steam chestpressure .for restraining` said member from .assuming said Vintermediateposition when the locomotive ceases to run under power, means actuatedby variation of the locomotive steam chest pressure for interrupting`said restrainingmeans and saiddetaining means, means connecting saidoscillatable member and said valve means by an air supply tothe valvemeans,= and secondary valve means actuated by the os- 'cillatable memberit'or controllingsaid air supply whereby the closing of said valve meansis effected by the movement ofvsaid member to 'either of its extremepositions and whereby the opening,` of said valve,

means is efected by the movement of said member to said intermediateposition.

Cil

6. In combination with a steam recipro-l cating locomotive, means forconveying` an auxiliary supply of steam from the boiler of thelocomotive to the mai-n engines of the locomotive, valve means forcontrolling said auxiliary supply of steam adapted for air operation, anoscillatable member adapted to be detained in a position l en mediatethe extreme positions or" said member, means actuated by variation otthe locomotive steam chest' pressure for oscillating said member in onedirection when the locomotive is runningunder power and in the oppositedirection when the locomotive ceases to run under power, means actuatedby variation of the locomotive steam chest pressure for detaining saidmember in lsai-d intermediate position on the back movement of' saidmember, means actuated by variation of the locomotive steam chestpressure for restraining said member from assuming said intermediateposition when the locomotive ceases to run under power, means actuatedby variation of the locomotive steam chest pressure for interruptingsaid restraining means and said detaining means, means connecting saidoscillatable member and said valve means by an air supply to the valve.means, and secondary valve means comprising poppet valves actuated inpairs bv the oscillat-able member for controlling said air supplywhereby the closing ot' said valve means is effected by the movement ofsaid member to either 'of its extreme positions and whereby the opening`of said valve means is effected by the movement ot said member to saidintermediate position.

'7.` In combination with a steam reciprocating locomotive, means forconveying an auxiliary supply of steam from the boiler of the locomotiveto the main engines of the locon'iotive, valve means for vcontrollingsaid auxiliary supply of steam adapted for air operation, anoscillatable member adapted to be detained in a position intermediatethe extreme positions of said member, means actu'- ated by variation ofthe locomotive steam chest pressure for oscillating, said member in onedirection when the locomotive is running under power and in the oppositedirection when the locomotive ceases to run under power, means actuatedby variation of the locomotive steam chest pressure for detaining saidmember in said intermediate position on the back movement of saidmember, means actuated by variation of the locomo tive steam chestpressure for restraining said member from assuming said intermediateposition when the locomotive ceases to run under power, means actuatedby variationot1 the locomotive steam chest pressure for interruptingsaid restraining means and said detaining means, means connecting saidoscillatable member and said valve means by an air supply to the valvemeans., secondary valve means comp-rising ,po-ppet valves seating uponbushings adapted to guide tappets, and tapp'ets for actuating saidvalves, said oscillatable member having cam surfaces adapted to actuatesaid tap-pets in pairs for controlling said air supply whereby theclosing of .said valve means is effected by the movement oft said memberto either of its eX- treme positions and wherebythe opening oft' saidvalve mean-s is eilected bythe movement ot said member to saidvintermediate position.

8. In combination with a steam reciprocating locomotive, means forconveying an auxiliary supply yot steam l'from the boiler of thelocomotive to the main engines of the locomotive, valve means forcontrolling said auxiliary 'supply et steam, an` oscillatable memberadapted to be detained in a position intermedi-ate the extreme positionsof said member, means actuated by vari-ation'of the locomotivesteamdchest pressure for oscillating said member in one direction whenthe locomotive is running under powerv and in the opposite direction'when the locomotive ceases to run under power, means actuated byvariation of the locomotive steam chest pressure for detaining saidmember in said intermediate position on the back move.- ment of saidmember and means actuated byv variation otl the locomotive steam chestpressure for restraining said member from assuming said intermediateposition when the locomotive ceases to run under power comprising pawlsunder continual spring pressure against said member, means actuated b,yvariation ot the locomotive steam chest pressure for interrupting saidrestraining means and said detaining means, and means connecting saidoscillata-ble member and said valvemeans whereby the closing ofsaidvalve means is etlected by the movement of; said member to either ofits eXtreme positions and whereby the opening of. said valve means iseiected by the movement of said member to said intermediate position.

In combination with a steam reciprocating locomotive, means forconveying an auxiliary supply of steam from the boiler of the locomotiveto the main engines ot' the locomotive, valve means for controlling saidauxiliary supply of steam, anoscillatable member adapted to be detainedin a position intermediate the eXtreme positions of said member, meansactuated by variation of the locomotive steam chest pressure foroscillating said member in one direction when the locomotive is runningunder power and in the opposite direction when the locomotive ceases torun under power, means actuated by variation of the locomof tive steamchest pressure; for detaining said member` in said intermediate positionon the back movement of said member and mean-s actuated. by variation ofthe locomotive steam chest pressure for restraining Y strikermeansadapted to engage a cam sur-I said member from assuming saidintermediate position when the locomotive ceases to run under powercomprising pawls under continual spring pressure against said member,means actuated by variation of the locomotive .steam chest pressure forinterrupting said restraining means and said detaining means comprisinga plunger having faceon each of said pawls, and meanscon- Y necting saidoscillatable member and said valve means whereby the closing of saidvalve means is effected by the movement of said member to either of itsextreme positions anduwhereby the opening of said valve means iseiiected lbythe movement ofvsaid member to said intermediate position.'

lO, In combination with a steam reciprocating locomotive, means torconveying an 'auxiliary supply of steam from the boi-ler ofYtha-locomotive to the main engines of thek locomotive, valve lmeans forcontrolling said auxiliary supply vof steam, an os- 'cillatable memberadapted to be detained in a position Vintermediate the extremeposit-ions of said member, means actuated by variationl of thelocomotive steam chestdpressure for oscillating said member in onedirection when the locomotive is ruiming under powerr and in theopposite direction when the locomotive ceases to run under powercoinprising a plunger subject to upward steam chest pressure of ,sa-idlocomotive and adapted topush said member, said plunger and said memberbeing subjectito continual downward resilient means, means actuated byvariationy of the locomotive steam chest pressure for detaining saidmember in said intermediateposition on the back `movement of said'member, means actuated 'by'variation of the locomotive steamfchestpressure for eating locmotive,lmeans for conveying an auxiliary supplyof steam from the boiler of the locomotive tothe main engines Vof thelocomotive, valve means for cont-rolling said auxiliary supply of steam,an oscillatable sleeve adaptedto be Vdetained in a position intermediatetheyextreme positions of said sleeve, means actuatedby variation of thelocomotive steam chestf pressure for-oscillating said sleeve in onedirection when the locomotive is running under power and in the oppositedirection when the locomotive ceases to run under power comprising aplunger subject to upward steam chest pressure oi said loco-motive andadaptedtopush saidA sleeve, said plunger and said sleeve being subjecttol continual downward compressed air pressure, means Vfor supplyingsaid compressed air pressure, means lactuated -by variation of thelocomotive steam chest pressure for detaining said sleeve in saidintermediate position on the back movement of said sleeve, meansactuated by vaand said valve means whereby the closingV of said valvemea-ns is effected by the movement of said sleeve toy either of itsextreme positions andr whereby the opening of said valve means iseffected by the movement of said sleeve to said intermediate position,

12. In combination with a steam reciprocating locomotive, means forconveying an auxiliary supply ot' steam from the boiler of thelocomotive to the main engines of the locomotive, valve means forcontrolling said auxiliary supply ofrsteam, said means for conveying anauxiliary supply of steam comprising a pipe line from the steam dome ofthe locomotive to the valve means and a pipe line from the valve meansto each steam chest of the locomotive, an os-cillatable member adaptedto berdetained in a. position intermediate the extreme positions of saidmember, means actuated by variation of the locomotive steam chestpressure for oscillating said member in one direction when thelocomotive is running under power and in the opposite direction when thelocomotive ceases towrun under power, means actuated by variation of thelocomotive steam chest pressure for detaining said member in saidintermediate position on the back movement of said' member, meansactuated by variation of the locomotive steam chest pressure forrestrainingsaid member from assuming said intermediate position when thelocomotive ceases Vto run under power, mea-ns for interrupting saidrestraining means and said detaining means, and means connecting saidoscill'atable- Amember and said valve meanswhereby the 'closing' of saidvalve means is effected by the movement of said member' to either` ofitsextreme po- Cil ico

sitio-nsA and whereby the opening of said valve means is effected by themovement of said member to said intermediate position.

In'testimony whereof l aflix my signature. ,RAYMOND P., LOUGHLIN, Y,

